2023
DOI: 10.3390/ijms241612801
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A Large-Scale Candidate-Gene Association Mapping for Drought Tolerance and Agronomic Traits in Sugarcane

Abstract: Dissection of the genetic loci controlling drought tolerance traits with a complex genetic inheritance is important for drought-tolerant sugarcane improvement. In this study, we conducted a large-scale candidate gene association study of 649 candidate genes in a sugarcane diversity panel to identify genetic variants underlying agronomic traits and drought tolerance indices evaluated in plant cane and ratoon cane under water-stressed (WS) and non-stressed (NS) environments. We identified 197 significant marker-… Show more

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Cited by 4 publications
(8 citation statements)
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“…Based on our previous research, we investigated the effects of drought stress on the yield components of 159 sugarcane genotypes, examining both non-stressed (NS) and drought-stressed (DS) treatments in the field experiments [ 61 ]. These genotypes exhibited varying degrees of drought tolerance, as evidenced by differences in cane yield and reductions in cane yield under drought conditions.…”
Section: Methodsmentioning
confidence: 99%
“…Based on our previous research, we investigated the effects of drought stress on the yield components of 159 sugarcane genotypes, examining both non-stressed (NS) and drought-stressed (DS) treatments in the field experiments [ 61 ]. These genotypes exhibited varying degrees of drought tolerance, as evidenced by differences in cane yield and reductions in cane yield under drought conditions.…”
Section: Methodsmentioning
confidence: 99%
“…After this initial testing, a panel comprising 159 diverse sugarcane accessions was genotyped with polymorphic SNP assays for marker validation. This population comprised a wide range of clones ( Wirojsirasak et al, 2023 ), including two from Argentina, 13 from Australia, four from Barbados, three from Brazil, two from China, one from Cuba, seven from Fiji, one from Guyana, six from India, four from Mauritius, three from the Philippines, one from Reunion, three from South Africa, one from Sri Lanka, 10 from Taiwan, 85 from Thailand, and nine from the USA, as well as four of unknown origin ( Table S2 ). Field experiments for the population were conducted at two locations: the Agronomy Field Crop Station, Faculty of Agriculture, Khon Kaen University, and the Mitr Phol Innovation and Research Center, Phu Khieo, Chaiyaphum, during the 2017–2018 (plant cane) and 2018–2019 (first ratoon) cropping seasons.…”
Section: Methodsmentioning
confidence: 99%
“…Phenotypic data were collected following Wirojsirasak et al (2023) . Briefly, the data were measured at 12 months after planting for the six sugar-related traits and six cane yield components, which included soluble solid content (Brix), sucrose content (Pol), commercially extractable sucrose (CCS), fiber percentage (Fiber), sugar yield, fiber yield, cane diameter, cane weight, cane length, node length, number of nodes, and cane yield.…”
Section: Methodsmentioning
confidence: 99%
“…When the precise location of the candidate genes is furtive, genetic mapping offers a straightforward and utile pipeline [48]. With this in mind, Ravelombola et al [32] and Wirojsirasak et al [33], respectively, mapped salt and drought tolerance in cowpea (Vigna unguiculata) and sugarcane (Saccharum officinarum), utilizing whole-genome and target enrichment sequencing. In the first study, Ravelombola et al [32] focused on the molecular pathways with the aim of controlling cowpeas' response to salt stress during the seedling stage.…”
Section: Polygenic Diversity For Abiotic Stress Tolerancementioning
confidence: 99%
“…Target SNP markers and candidate genes associated with the leaf chlorophyll content and damage scores phenotypes were identified on chromosomes 1 and 2, and included genes for potassium channels and GATA TFs, respectively. Meanwhile, Wirojsirasak et al [33] inspected 18 traits and 649 candidate genes and captured 197 significant marker-trait associations (MTAs) during the drought response of sugarcane. Interestingly, these MTAs exhibited unique genetic variations associated with physiological adaptation, phytohormone metabolism, and drought response mechanisms.…”
Section: Polygenic Diversity For Abiotic Stress Tolerancementioning
confidence: 99%